curl --request POST \
  --url https://api.tryarchitect.com/v0/pages/{page_id}/audiences/{audience_id}/versions/{version_id}/cancel \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{}'

{
  "archivedAt": "<string>",
  "audienceId": "<string>",
  "becameDraftAt": "<string>",
  "cancelledAt": "<string>",
  "createdAt": "<string>",
  "isNewPageAgent": true,
  "obsoleteAt": "<string>",
  "publishedAt": "<string>",
  "queueDurationMs": 123,
  "queuedAt": "<string>",
  "supplementaryContext": "<string>",
  "versionId": "<string>",
  "versionNumber": 123
}